Digital BW, The Print

For those of you using Qimage for Black-and-White...

I am trying the demo and got stuck on 2 points:

1. I am working on 16-bit grayscale files.  Qimage changes them to 8-
bit.  Is there a way to keep them as 16-bit?

2. I would like to keep the Qimage files in grayscale, preferably 
Untagged Gray, but Qimage changes them to RGB files.  I don't know 
how to keep them in grayscale.  Where are the gray profiles on a PC?  
(I can find all my color profiles but do not see any gray settings.)

Helene